Multiplex communications – Pathfinding or routing – Switching a message which includes an address header
Reexamination Certificate
2010-06-21
2010-12-28
Shah, Chirag G (Department: 2477)
Multiplex communications
Pathfinding or routing
Switching a message which includes an address header
Reexamination Certificate
active
07860104
ABSTRACT:
The invention is directed toward techniques for Multi-Protocol Label Switching (MPLS) upstream label assignment for the Resource Reservation Protocol with Traffic Engineering (RSVP-TE). The techniques include extensions to the RSVP-TE that enable distribution of upstream assigned labels in Path messages from an upstream router to two or more downstream routers of tunnel established over a network. The tunnel may comprise a RSVP-TE P2MP Label Switched Path (LSP) or an Internet Protocol (IP) multicast tunnel. The techniques also include extensions to the RSVP-TE that enable a router to advertise upstream label assignment capability to neighboring routers in the network. The MPLS upstream label assignment using RSVP-TE described herein enables a branch router to avoid traffic replication on a Local Area Network (LAN) for RSVP-TE P2MP LSPs.
REFERENCES:
patent: 2003/0210705 (2003-11-01), Seddigh et al.
patent: 2004/0042406 (2004-03-01), Wu et al.
patent: 2006/0039364 (2006-02-01), Wright
patent: 2007/0025277 (2007-02-01), Sajassi et al.
Rahul Aggarwal & J.L. Le Roux, “MPLS Upstream Label Assignment for RSVP-TE and LDP”, Aug. 24, 2005, http://tla-group.com/˜mpls/ietf-63-mpls-upstream-rsvp-Idp.ppt, *Note: Fore date of document, see http://www.tla-group.com/˜mpls/ and select the ietf-63-mpls-upstream-rsvp-Idp.ppt document, All pages pertinent.
Satyanarayana et al., “Extensions to GMPLS RSVP Graceful Restart”, draft-arums-ccamp-rsvp-restart-ext-01.txt, Jul. 2004, Network Working Group Internet Draft, p. 12.
Juniper Networks, Inc.
Shah Chirag G
Shumaker & Sieffert P.A.
Thompson, Jr. Otis L
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